10 of the best celebrity Halloween costumes of all time
Martha Stewart and Blake Lively
Martha Stewart and Blake Lively got into the spirit of the season when Lively was a guest star on The Martha Stewart Show in 2008. Stewart went all out as Medusa, while Lively channeled Cleopatra.
Sandra Bullock and her son Louis coordinated their costumes last year by dressing up as Woody and Buzz Lightyear from Pixar's Toy Story.
Neil Patrick Harris and David Burtka
Neil Patrick Harris, David Burtka and their twins Gideon and Harper made Halloween a family affair by dressing up as characters from The Wizard of Oz.
Ellen Degeneres pulled out all the stops when she dressed up as Modern Family star Sofia Vergara by re-creating her Emmys dress!
Stacy Keibler looked boo-tiful as the host of a Halloween masquerade at the Hyde Bellagio in Las Vegas. Keibler paired her costume with jewelry by Graziela and Dana Rebecca Designs.
Supermodel Giselle Bundchen channeled the Egyptian pharaoh, Cleopatra, with a gold headpiece, bright blue eyeshadow, and beaded black locks.
Jessica Alba, husband Cash Warren, and daughter Honor dressed as the cast of Pixar's The Incredibles for Gwen Stefani's party last year in Hollywood.
Kim stuck with the green theme at Midori's Halloween party at Avenue in the Meatpacking District of Manhattan. The reality star opted for a curve-hugging mermaid costume topped off by a wig that cost more than $2,000.
Diddy made it rain purple for last year's Halloween, dressed to the nines as the unmatchable Prince.
The 90210 actress wore a custom Chris March-designed look inspired by Mattel's Frankie Stein doll--sparkly purple jacket and all!